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研究了日本濑户内海屋岛湾沙质海滩底栖甲藻中具有底栖 浮游兼性行为的种类及其浮游行为特征。发现具有浮游兼性特征的有8种 ,分别是Amphidiniumcarterae,A.klebsii,A.herdmanae,Gymnodiniumsp1,G.pyrenoidosum,Peridiniumquinquecorne,Prorocentrumemargina tum和Pror.sp1,几乎全是该潮间带底栖甲藻的优势种 ,占水样中甲藻种数的11.6%。个体数占海水样品中甲藻总个体密度的0～51.3% ,具有明显的季节性。当这些种类在沉积物样品中数量较少时 ,在海水样品中就极少出现 ,具有随潮汐变化的行为特征。研究表明这些种类是真底栖种 ,浮游生活只是其兼性行为特征 ,是长期进化和对潮间带特殊环境适应的结果。本文还探讨了底栖甲藻的浮游习性及其与内湾近岸赤潮的关系和可能产生的影响。
The species of benthic zooplankton allogenic behavior and its pelagic behavior in the benthic dinoflagellates of the sandy beach of the Seto Inland Islands, Japan were studied. Eight species with the characteristics of planktonic facultativeness were found, which were Amphidinium carterae, A.klebsii, A.herdmanae, Gymnodiniumsp1, G.pyrenoidosum, Peridiniumquinquecorne, Prorocentrumemargina tum and Pror.sp1, respectively, Dominant species, accounting for 11.6% of the species of dinoflagellate water. The number of individuals accounted for 0 ~ 51.3% of the total individual density of dinoflagellate in seawater samples, with obvious seasonal. When these species are present in small quantities in sediment samples, they appear infrequently in seawater samples with behavioral characteristics that vary with tide. Studies have shown that these species are true benthic species, and that planktonic life is only characterized by facultative behavior, as a result of long-term evolution and adaptation to the special environment of the intertidal zone. The paper also discussed the pelagic behavior of benthic dinoflagellates and their relationship with the inland nearshore tidal flats and their possible impacts.